A kind driver pulled over to help a motorcycle rider who crashed into a field.

Sinchai Onpraser was heading home after having lunch with his girlfriend when he witnessed a motorcyclist on the opposite lane suddenly veer off the road and tumble into a field.

Dashcam footage from Sinchai's car shows the motorcycle rider sliding off the road and rolling uncontrollably down the grassy embankment in Ayutthaya, Thailand on March 9.

Sinchai stopped his vehicle and rushed to assist the fallen rider who had an elderly pillion passenger.

The Good Samaritan said: 'I was driving past a temple and a motorcycle came driving on the opposite direction.

'Suddenly, it swerved off the road. I was very shocked and told my girlfriend. We stopped to help.'

The driver checked the motorcycle rider and his father for injuries.

Sinchai added: 'After around five minutes a resident passed by and helped lift the motorcycle off the mud.'

Both the motorcycle rider and his father only had minor injuries.